Leimer Castellano

Development, enhancement, and optimization of a proprietary OS based on an OPNsense fork, focused on cybersecurity and networking environments. Design, improvement, and maintenance of backend APIs in PHP for centralized system management, achieving increased efficiency and faster response times. Implementation and management of monitoring and security pipelines (logs, alerts, antivirus, and VPNs) using Shell, Python, and Java, Led and coordinated development tasks, conducted code review and managed projects

Designed and developed the backend and frontend of an Android application in Java, implementing REST APIs with Spring Boot and integrating them efficiently into the application. Ensured software quality through unit testing with JUnit. Designed, implemented, and managed the database, optimizing schemas and queries to ensure data integrity, high performance, and scalability.

Integration of OpenVPN and WireGuard into corporate software, design and automation of QA testing processes and backend development using Python and PHP

Concurrent with studies. Optimized HR processes by automating workflows and enhancing user experience through strategic application integration and customization. Orchestrated the structuring of employee data, reporting, and payroll to ensure seamless systems interoperability and high data integrity